A guide to San Diego's border region
San Ysidro is the busiest land border crossing in the Western Hemisphere. Here is how San Diego lives with the line.

SAN YSIDRO: San Diego is a border city, and the border is not an abstraction here. The San Ysidro Port of Entry, where the city meets Tijuana, is the busiest land border crossing in the Western Hemisphere.
Day in and day out, the port processes a steady stream of northbound vehicles and pedestrians: commuters, students, families, and travelers in both directions.

Other crossings serve the region too, including Otay Mesa to the east.
One region, two countries
To a newcomer, the striking thing is how binational daily life is here: workers, goods, and family ties cross the line constantly, and the trolley's Blue Line runs from downtown San Diego all the way to the border at San Ysidro.
The border is a constant presence in the region's politics, economy, and culture. It is the reason this newspaper covers the crossing, the border communities, and the policies made far away that land here first.

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